louisli

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原帖由 vr2uhu 於 4-9-2009 15:48 發表
hi guys
i have a plastic M9 bought around 3 years ago
it have a fixed hop up system which is way over..the bullet is balooned after 20 meter.
any one know if there is a variable hop system that can ...

Have you try to disassemble the whole thing?  I can see there are at least 2 parts that you did not opened.